Assessment of Carbon Capture, Utilization and Storage for Gasendal: A techno-economic analysis for the pre-feasibility study of CCUS for a bio-gas upgrading plant.
Overview
- Date:Starts 14 June 2023, 10:30Ends 14 June 2023, 11:45
- Location:Seminar room Earth, division Energy Technology, level 4, M-building, Hörsalsvägen 7
- Language:English
- Last sign up date:14 June 2023
Student: Sergio Sagastuy Brena
Main Supervisor: Maria Grahn, Chalmers and Mariliis Lehtveer, Göteborg Energi
Examiner: Maria Grahn
Opponent: Gustavo Ezequiel Martinez, N5T MPSES and Mohammad (Rayan) Rahmanpour, MPSES
Abstract of thesis
In order to meet the goals set in the Paris Agreement and the stringent CO2 emission level targets set in Sweden, there is an urgent need to increase the amount of CO2 utilization and storage.
This thesis presents a techno-economic analysis of CO2 liquefaction and the synthesis of electro-methanol as a CO2 utilization pathway for captured CO2 from Gasendal, a biogas upgrading plant. The processes are implemented and simulated in Aspen Plus to extract important parameters and calculate capital and operational costs as key performance indicators.
The results show that liquefaction costs 34.43 €/tonCO2 for Gasendal, which is 80% higher than other authors. However, when increasing the plant size to 1 MtonCO2/year, the cost decreases to 10.50 €/tonCO2. In terms of heat recovery potential, the plant could only provide heat to district heating, but the amount is too small considering no close pipelines.
On the other hand, e-methanol synthesis costs resulted in 132.27 €/tonMeOH for methanol synthesis and 1259.19 €/tonMeOH for hydrogen production through alkaline water electrolysis. Since electrolysis costs are the bottleneck and, in this study do not decrease with plant size, the total e-methanol synthesis cost does not decrease with plant capacity. Regarding heat recovery, the process is able to supply 98% of its own heating demand and reduce the natural gas consumption in the existing process at Gasendal by 48%.
